Avionics can make or break two things: Your ownership experience and your bank account. There is no need for you spend tens of thousands of dollars on flashy big-name brand displays that require complex wiring, power and switching arrangements.
Modern electronics and wireless technology allow you to get EVERY SINGLE FEATURE that you could possible imagine in a lightweight package for a fraction of the price.
I guarantee the you would need to be flying a jet aircraft to find better quality information that what you will find here for just a few thousand dollars.